package com.sdkj.recruit.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {

    /***
     * MD5加码 生成32位md5�?
     */
    public static String string2MD5(String inStr) {
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        }
        catch (Exception e) {
            System.out.println(e.toString());
            e.printStackTrace();
            return "";
        }
        char[] charArray = inStr.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++)
            byteArray[i] = (byte) charArray[i];
        byte[] md5Bytes = md5.digest(byteArray);
        StringBuffer hexValue = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++) {
            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16)
                hexValue.append("0");
            hexValue.append(Integer.toHexString(val));
        }
        return hexValue.toString();

    }
    
    

    /**
     * 加密解密算法 执行�?次加密，两次解密
     */
    public static String convertMD5(String inStr) {

        char[] a = inStr.toCharArray();
        for (int i = 0; i < a.length; i++) {
            a[i] = (char) (a[i] ^ 't');
        }
        String s = new String(a);
        return s;

    }

    public static String Md5(String plainText) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(plainText.getBytes());
            byte b[] = md.digest();

            int i;

            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < b.length; offset++) {
                i = b[offset];
                if (i < 0)
                    i += 256;
                if (i < 16)
                    buf.append("0");
                buf.append(Integer.toHexString(i));
            }
            return buf.toString();
            // System.out.println("result: " +
            // buf.toString().substring(8,24));//16位的加密

        }
        catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return plainText;
    }
    
    // 测试主函�?
    public static void main(String args[]) {
        
        
        String a="appid=wx4082b136afc8a0c6&body=YOKI语音支付&mch_id=1320775601&nonce_str=20160315164944044pj7x4tw&notify_url=http://120.76.75.155:8080/yokivoice/weixinCallBack/weixin&out_trade_no=201603151649440447u540mw&spbill_create_ip=10.0.4.15&total_fee=1&trade_type=APP&key=c95407fd3243c2d9fe6873d11966685e";
        System.out.println(string2MD5(a));
        /*String s = new String("123");  
        System.out.println("原始�?" + s);  
        System.out.println("MD5后：" + string2MD5(s));  
        System.out.println("加密的：" + convertMD5(s));  
        System.out.println("解密的：" + convertMD5(convertMD5(s)));*/

    }
}
